CIRIA 108 is often considered more flexible for low- to moderate-rate pours, while EN 12812 is more prescriptive for safety-critical applications. Many formwork manufacturers now produce load tables that directly reference loading.
Most engineers memorize the rule of thumb: Pressure is 110 kN/m² or ( 2.4 \times R ), whichever is lower. But the report details five distinct concrete types (ST1 to ST5) and their rheology. ciria report 108 concrete pressure on formwork
Dependent on the formwork's dimensions and shape; it distinguishes between walls and columns. cap C sub 2 (Material Coefficient): CIRIA 108 is often considered more flexible for
Retarding admixtures extend the time before initial set. This effectively increases R/T ratio, raising pressure. The report suggests applying a temperature correction or using an "effective temperature" lower than the actual concrete temperature. ciria report 108 concrete pressure on formwork